Abstraction in the form of waves, beautiful designAbstraction in the form of waves, beautiful design
Creative geometric pattern in the form of a flowerCreative geometric pattern in the form of a flower
A picture of a woman with a bow and a glowing arrowA picture of a woman with a bow and a glowing arrow
В математике: всякая непрямая линия. Кривая линия, изображающая рост или падение чего-н. в развитии какого-н. процесса.